Machine tool



N. P. DARASH MACHINE TOOL June 14, 1949.

Original Filed Nov. 11, 1943 2 Sheets-Sheet l W 5 mm mm M. R s m M Na 2m 2 WW %m a Yr m A H.

N. P. DARASH MACHINE TOOL June 14, 1949.

2 SheetsSh eet 2 Original Filed Nov. 11, 1943 v INVENTOR. NICHOLAS PDHPASH Patented June 14, 1949 MACHINE TOOL Nicholas P. Darash,Cleveland, Ohio, assignor to The Warner & Swasey Company, Cleveland,Ohio, a corporation of Ohio Original application November 11, 1943,Serial No. 509,841. Divided and this application October 21, 1944,Serial No. 559,738

8 Claims. 1

This invention relates to a machine tool and more particularly to meansfor supplyin coolant to the tools carried by an indexible member of amachine tool. Although the mechanism may be advantageously employed invarious types of machine tools for different indexible members thereofit will be shown and described herein by way of illustration as appliedto the turret of a turret lathe.

This application is a division of my copending application Serial No.509,841, filed November 11, 1943, and now Patent No. 2,461,631, grantedFebruary 15, 1949.

An object of the invention is to provide improved and novel means forsupplying coolant to the tools carried by the indexible member of amachine tool.

Another object of the invention is to provide means for supplyingcoolant to the tools carried by the indexible member of a machine tooland which means is controlled by the indexing of said member.

A further object is to provide means for supplying coolant to thecutting tool carried b an indexible member of a machine tool and whichcutting tool is currently in position to perform machining operations onthe work.

A further object is to provide means for supplying coolant to the toolscarried by the indexible member of a machine tool and wherein thecoolant is supplied only to the cutting tool Which is in work performingposition, while the coolant is drained away from the other and inactivecutting tools carried by the indexible member.

Another object is to provide means for supplying coolant to varioustypes and kinds of tools and tool holders which may be mounted on thedifferent faces of an indexible member of a machine tool and in suchmanner as is efficient, accessible and convenient and wherein thecoolant connections to the tool or tool holder on the respective faceswill not interfere with the connections to those on the other faces.

' Further and additional objects and advantages not hereinbeforereferred to will be pointed out Fig. 3 is a detached fragmentaryirregular sectional view on a larger scale of a portion of the turretshown in Figs. 1 and 2 and is taken substantially on line 3--3 of Fig.5, looking in the direction of the arrows.

Fig. 4 is a detached fragmentary elevational view taken looking from theright hand side of Fig. 1.

Fig. 5 is a fragmentary sectional view taken substantially on line 55 ofFig. 3, looking in the direction of the arrows.

Fig. 6 is a sectional view taken substantially on line 6-6 of Fig. 3,looking in the direction of the arrows.

Fig. 7 is a detached top plan view of a portion of Fig. 3.

Fig. 8 is a fragmentary front elevational view of the turret and shows atool holder attached to the front face of the turret and a coolantconnection between said tool holder and the lower part of the turretadjacent the rear end of the front face.

Fig. 9 is a view similar to Fig. 9 but partly in section and shows thecoolant connection extending from the top of the turret at the rear ofthe front face to the tool holder, and

Fig. 10 is a view similar to Fig. 9 but shows the coolant connectionlocated internally of the turret and connected to the passage whichextends to the rear part of the front face of the turret and to the toolholder mounted on said front face.

As will be well understood, the turret lathe, only portions of which areshown in the drawings, includes a bed having at one end a headstockwhich supports the work spindle. The bed (not shown) is provided withthe usual parallel Ways on which the turret slide it moves toward andaway from the Work spindle. The turret slide l i is provided in thisinstance with a hexagonal indexible turret I2. As will be understood bythose skilled in the art, the turret lathe may be provided intermediatethe turret slide and the work spindle with a cross slide carriagemovable on the ways of the bed and provided with a cross slide having asquare turret.

Although the invention may be applied to different types of turrets orindexible members, the hexagonal turret 12, shown herein for purposes ofillustration, is provided with a centrally located downwardly extendinghollow post It. The turret l2 and the post Eli are held against axialmovement in one direction relative to the bearing opening in the turretslide I i and in which opening the post is located, by means of a disk Il secured to the lower end of the post I 3 in any suitable manner. Itwill be noted that the underside of the turret l2 bears against theupper side of the slide H and thus the turret and post are held againstaxial movement in the other direction relative to the bearing opening.It will thus be seen that the turret i2 is freely rotatable on the slideH. The turret i2 is clamped in indexed position by a clamping ring. Theturret may be unclamped, unlocked, indexed, located, locked and clampedby the mechanism for such purposes fully described in my saidapplication Serial No. 509,841, of which this application is: adivision, or by any other suitable mechanisms for performing suchfunctions. The means for supplying coolant to the cutting tools carriedby the turret will now be described.

Referring to Fig. 4, a conduit leads-l from a pump (not shown)preferably located in the base of the machine to one side of a controlvalve it with the other side ofsaid valve connected to a conduit 1-?leading to the sump. In advance of the valve IS the conduit [5 isprovided with a T-connection iii to which is connected a pipe l9 thatextends toward the front ofthe turret slide. I l and terminates adjacentthe axis of the turret. The valve It may be manually-operatedindependently of any other mechanism of the machine or it may beoperated automatically by the movement of the control-lever for'theturret indexing, locating, locking and clamping, mechanism as describedin my said copending application Serial No. 509,841.

The forward end of the pipe 19. is connected to a stationary coolantcontrol member 29. which extends vertically and centrally withinthe postl3 of the turret. The member is provided with a centrally disposed bore2!, the upper end of which is.closed by a plug 22 while the. lowerend ofsaidbore communicates with thepipe l9.

Referring to Fig. 2, it will be noted that the a sectional. view of theturret is taken along. line 33.of' Fig. 5, while the sectional view ofthe turret slide. is taken along a straight line passing diametricallythrough the turret. The member 29 adjacent its upper end is providedwith. a laterally. extending passage 23 that. communicatesselectivelywith one or another ofsix equally spaced openings 24 formed in a ring25. fixed in the turret. The turret I2 is provided with six equallyspaced outwardly and upwardly extending passages 25, the upper ends ofwhich are threaded; to receive either plugs 21 or the threaded endsof a.coupling member later to be-referredto. Each of the passages 26communicates with. a radially extending passage 28 that hasitsouter endthreaded so as to receive a plug 29 or a coupling fitting later to bereferred to. Each. of the radially. extending passages 29 communicatesadjacent its. outer end with the lower end. of a vertically. extendingpassage 30, the. upper, end of which is threaded and may be closed. by aplug, 3| or may receive a coupling fitting, later to be referred to.Each passage 26 communicates with an opening 24 in the ring 25. and. asthe turret indexes to its different indexed. positions the passage 23 inthe member 20 is successively brought into communication with. one of.the openings 24iin the ring and one of the passages26 in the turret, itbeing remembered that the member 20 is stationary at all times.Consequently it will be seen that the passages. 26, 23 and. 30. and theopening 24 in the, ring. 25 whichare adjacent the rear corner of thefront face of the turret, i. e., that one facing the spin.- dle. are incommunication with the bore 2| in the member 20, and consequentlyreceive the coolant from the pump when the valve 16 is adjusted so thatcoolant is not flowing to the sump through the valve and the conduit H.The remaining passages 26 and openings 24 are in communication. throughsmallzdiainageopenings 32 with circularly spaced vertically extendingpassages 33 formed in the upper part of the stationary member 20 andwhich passages communicate at their lower ends with the annular chamberformed by said member 28 and the post 13 of the turret intermediate theends of the member 20, as clearly shown in Figs. 2 and 3 and asindicated by the reference character A. The lower' endof the member 20is provided with a plurality -of..circularly spaced drainage passages.34 which"extend through said lower end of the. member and allow anycoolant collected in the annular chamber A to flow outwardly thereof andreturn to the-sump.

The turret I2 isprovided "with'; a centrally located recess'35 above thepost 13 and a "strainer member 36 is arrangedi'n this recess and in itsbottom-wall is' provided with; a plurality of 'open- P ings; whereforecoolant can pass: from; thestiainopposite end oil-which hoseisxconnect'ed to a:

coupling fitting 39 which communicates. with an opening in the toolholding member: dm'wherefore coolant is free to. flow from' the passage28' through the hoseSB' and'to the; tool carried.

by the frontface of the turret.

In Fig. 9' the plug 3'! at the upper rear. corner of the front face ofthe turret has b'eenremoved' and a. coupling'fitting, .41 screwed.into-the upper end of the passage-3'0. This coupling'fitting. isconnected to one end of a hosedz thenpposit'e end of which hose-isconnected. .to a coupling.

fitting 43, in turn connected to theiendiof' the tool. holding member 44within. the turret;,wherefore coolant can. flow from. the. passage. 30;.

through the hose 42'2t'o the toolv carried by the member 441 In Fig. 10,the plugiZT atthe uppenendiof the passage 26 which extends .towardithe.rear cornor of the front face. of the turret. and which plug is locatedwithin the" t'urretiisremovedand a coupling. fitting 45, is connected.to. one ,end. of

a hose 45 located within. the turret; andlhavi'ng.

its opposite end connected to 'a.coup1ing,fitting H which is connectedwithinthe turret..to.. the. tool holding member. 48;.whereforecoohnhwill'.

flow to the cutting toolc at thev frontfacepf, the turret from the.passage ZSithrough-the hoseLdB. From the foregoing it will'be-notedthat. various types and. kinds of .t'oolhold'ers can.lie .mo11nted.

tioned where they willnot interfere with thetool holders on the otherturret faces.

When the valve .16 is adjusted to close communication between'the valveand the pipe 11 to the sump the coolant will flow through the pipes i5and 19 to the tool holder that is carried by the front face of theturret, but no coolant will flow to the tool holders carried by theother faces of the turret and which are in inactive position. This isdue to the fact that the passage 23 only communicates in each indexedposition of the turret with the passages 26, 28 and 30 that extend tothe front or active face of the turret.

It will also be understood that in each indexed position of the turretany coolant which is in the passages that extend to the inactive facesof the turret is draining back into the sump through the openings 32,passages 33, the annular chamber A and the passages 34.

Preferably the valve IE will be actuated prior to each indexing movementof the turret, so that the conduits l5 and I! are in communication witheach other and the coolant is flowing freely from the pump to the sumpand is not flowing to the turret, while any coolant which may be in thepassages leading to the tools or tool holders previously used isdraining back to the sump. In this way the indexing movement of theturret will not cause any coolant to be thrown outwardly by centrifugalforce.

Although a preferred embodiment of the invention has been illustratedand described herein it should be understood that the invention issusceptible of various modifications and adaptations within the scope ofthe appended claims.

Having thus described my invention, I claim: 1. In a machine tool, asupport, an indexible member thereon and provided with a plurality offaces adapted to mount tool holders, passages in said member extendingfrom centrally thereof to each of said faces, fixed means locatedcentrally of said member and provided with a passage and a portextending laterally from said passage and adapted to registersuccessively with each one of said first named passages as said memberprogresses through its different indexed positions, said fixed meansbeing provided with spaced passages and laterally extending drainageopenings adapted to communicate with the other of said first namedpassages in each indexed position of the member whereby coolant can beintroduced into said one passage of the member and drained from theremaining passages thereof.

2. In a machine tool, a support, an indexible member thereon providedwith a plurality of faces adapted to mount tool holders and having acentral hollow post depending from the underside of said member androtatably mounted in said support, passages in said member communicatingwith the interior of said post and extending to each of said faces,means located within said post and provided with a passage and a portextending laterally from said passage and adapted to registersuccessively with each one of said first named passages as said memberprogresses through its different indexed positions, said means alsobeing provided with spaced passages and laterally extending drainageopenings adapted to communicate with the other of said first namedpassages in each indexed position of the member whereby coolant can beintroduced into said one passage of the member and drained from theremaining passages thereof.

3. In a machine tool having a support, an indexible member thereon andprovided with a plurality of faces adapted to mount tool holders, saidmember being provided adjacent each face thereof with passagesterminating at their outer ends at different locations with respect tothe,

respective faces and with said outer ends of said passages formed toreceive a closure plug or a hose fitting as the case may be whereby ahose can be connected selectively to any one of said passages and to atool holder mounted on the respective face of said member, and means forconnecting said passages with a source of coolant pp y.

4. In a machine tool having a support, an indexible member thereon andprovided with a central recess and having its periphery formed with aplurality of flat faces, groups of passages in said member with thegroups corresponding in number to the number of faces of said member andwith each group of said passages including a passage terminating intosaid recess adjacent the respective face of the member, a passageextending to the outer surface of said respective face adjacent thelower portion thereof and a passage extending to the upper edge of therespective face; the outer ends of said passages being threaded toreceive closure plugs or hose fittings, and means for placing thepassages of each group of passages in communication with a source ofsupply of coolant.

5. In a machine tool having a support, an indexible member thereon andprovided with a plurality of faces adapted to mount tool holders, saidmember being provided with a plurality of coolant passages leading tosaid faces, and means operatively associated with said member andprovided with passages corresponding in number to said first namedpassages and communicating with said first named passages in eachindexed position of said member, one of said passages in said meansbeing connected to a coolant supply source and acting to introducecoolant into one of the member passages in each indexed position of saidmember, the remaining passages in said means acting as drainagepassages.

6. In a machine tool having a support, an indexible member thereon andprovided with a central recess and having its periphery formed with aplurality of flat faces, circularly spaced passages in said membercorresponding in number to the number of said faces, groups of passagesin said member with the groups corresponding in number to the number ofcircularly spaced passages and with each group communicating with acircularly spaced passage and including a passage terminating in saidrecess adjacent the respective face of the member, a passage extendingto the outer surface of said respective face adjacent the lower portionthereof and a passage extending to the upper edge of the respectiveface; the outer ends of said group passages being threaded to receiveclosure plugs or hose fittings, and means operatively associated withsaid member and automatically and successively placing each of saidcentrally spaced passages in communication with a source of supply ofcoolant as said member is indexed.

7. A machine tool as defined in claim 6 and wherein said means isprovided with passages corresponding in number to said circularly spacedpassages and adapted to communicate with said circularly spaced passagesin each indexed position of said member, one of said passages in saidmeans being in communication with a source of supply of coolant and theremaining passages in said means being drainage passages.

8. In a machine tool having a support, an indexible member thereon andprovided with a plura'lity of faces adapted to mount toot holders,v saidmember being provided with circuiafly zspac'ed. passages correspondingin number-to: said tfaces, said member also: beingxprovi'ded adjacenteach face. thereof with passages terminating at their outer ends-"atdifferent locations with respect to the respective faces and at theirinner ends communicating with said first mentioned: pas-- sages-"andwith said outer ends ofsaidi second mentioned passages formed to receivea closure plug. or a hose fitting as the case. maybe whereby a hose:canrbe connected selectivelyto' any one'of. said-second named passagesand. to a tool holder mounted on the respective face of saidimember',and? means cooperating with said member and provided with a coolant;supply passage; success'ively communicating with one of said first namedpassages in each indexed positioniotsaid 8 nrember;.-said-means alsohaving drainage passagescommunicatingwith the remaining of said firstnamed passages in each indexed position of said'i member.

NICHOLAS P. DARASH.

REFERENCES CITED The-following references are of record in the file ofthis patent:

